Preumably, that is in a non visible, or at least hard to see, position?
you cant see the picture?
I can see skirting board and a cap. A compression cap. Big and bulky. Perfectly legal, but a pro would not do this in an "in view" position. That is to say, not on the front aspect of a chimney breast, but maybe on the return. Never in a "concealed" position such as under boards.
Unless the customer said make it safe as cheap as possible.
No offence intended.
This sounds like a riddle. Sorry